Printing press for printing spots of wax carbon on sheets of paper



Feb. 25, 193e. W F EUR@ [2,032,047

PRINTING PRESS FOR PRINTING SPOTS OE WAX CARBON ON SHEETS OF PAPER FiledOt. l2O, 1934 MAMMAAAAMAMMA/MAA M AAAM"fvvvvvvvvvvyvvvvvvvvvvvvvvvvvvvvq 3 INVENTOR.

WML/A41 ff BURKE ATTORNEY.

Patented Y Feb. 25', 1936` UNITED STATES PATENT. o'FFicE .PRINTING PRESSFOB PRINTING SPOTS OF WAX CARBON N SHEETS 0F PAPER william F. Burke,Athens, ohio, as'signor to The McBee Company, Athens, Ohio, acorporation Y of Ohio Application October 20, 1934, Serial No. 749,251

heated and all the parts o'fit which contact the` wax lcarboncompoundmust be heated including the type bed and inkplate.

.10 It is well `known in the art that the make up time is the mostexpensive part of the printing and Rutkoskie provides a'large number ofdrilled and tapped apertures in the lock-up base to facilitate themounting of the printing plate butv l even this arrangement consumes aconsiderable Y period of time; Others have attempted toevercome this bymeans of electro magnets mounted in the type bed and then placingmagnetic material in the back of the I printing .plate so that themagnetism will hold the plate in position. 'I'hese save some time butrequire -a specially prepared printing plate. Itis moreoverunsatisfactoryA because if one were to attempt to use it in a printing Ypress for printing spots of wax carbon on sheets of paper the. heatwould quickly ruin theinsulation of the magnetic coils thus producing ashort which would necessarilyk destroy the usefulness of Y 'that theelectric magnets may be used in the type .bed without the slightestdeleterious effect of the heat'upon the magnetic coils. f

lA further object is to provide printing plates, veither formed entirelyof magnetic metal so no special construction of Vthe plates is required,or a magnetic metal base and a type metal plate. Y

i A further object is to provide @or a plurality of magnets'soconnectedthat a printing plate or a 45 plurality of them can be securely held atvany ,location on the type bed. l'

My meansof accomplishing the foregoing ob'- jects maybeimore readilyunderstood by having referencel to the accompanying drawing, which 50 ishereunto-annexed and is a partf .this'specii cation., in which- Fig. lAis-a top'or plan view of printing Press Fig. 3 is a fragmentary detailview on an enlargedscale for the sake of clearness.

Similar reference numerals refer to similar parts throughout the entiredescription.

As shown in the drawing, the type bed l is of the 5 standardconstruction used on va Kelly press, though it will be clear that myinvention is not limited to that press but is referred to solely forillustrative purposes. The bed l is provided with the usual rack 2 forits reciprocation and has an 10 `inl: plate 3 adjoining it.

Provision is made for heating the type bed l and ink plate 3 by means ofelectric heating elements 4 mounted in the bed and plate respectively.As my invention does not relate to the heating of 15 these parts, Ishall not further describe it. 'I'he Rutkoskie patent fully 'sets forththe means for that purpose.

AThe bed is shown mounted upon rollers 5 in the Y usual or customarymanner. In the type bed l 20 I mount a plurality of electric magnets 6,their cores 1 extending through the type bed l. These cores arepreferably surrounded by a layer of non-magnetic material l2 clearlyseen in Fig. 3. 'I'he windings 6 are connected4 by electric con- 25ductors to a panel 9 through which any series of magnets may beenergized, so as to exert a magnetic pull upon a printing plate l0'.

As shown in the drawing, these plates may be made of steel or'iron, orany suitable mag- 30 netic substance. These plates preferably shouldhave their surfaces plated and polished or they may be formed ofnon-metallic material afterwards attaching suitably shaped pieces ofmagnetic substance or they may have an electrode- 35 insulation, it willbe obvious to persons skilled in theart that my invention is not limitedto any speciiic typeof insulation but any protective covering which willserve toinsulate the mag-a nets 6 from the heat produced by the electricheating elements l will be withinthe scope of l invention. L

Preferably the electric conduits are flexible so as tn permit thereciprocation of the type bed I without interfering 'with the flow, ofthe current to the magnets.

While I show and describe a speciiic arrangement for connecting thecoils to the panel 9,' it will be obvious, to persons skilled in theart, that the invention is 'not conned to any specie typeof apparatusfor this purpose, and

-any suitable or convenient vmeans whereby any desired set of magnetscan be cut in as found necessary, will serve equally well as the formillustrated.

Having described my invention what I regard as new and desire to secureby Letters Patent is:

1. In a type bed for printing presses for print-A in g spots of waxcarbon on sheets of paper, a.

plurality of heating elements to heat the bed, -a plurality of electricmagnets mounted therein, said magnets being spaced from each other,

means to supply electric current to said magnets,

vprotect the Winding means to supply said current to any predeterminednumber of said magnets, and means to of said magnets from the heat.` e

2; In a reciprocating type bed for printing presses for printing spotsof wax carbon on sheets of paper, a plurality of heating elements toheat the bed, a plurality of electric magnets mounted therein, saidmagnets being spaced from each l other, means to supply electric currentto said magnets, means to supply said current to any predeterminednumber of said magnets, and means to maintain said current supplycontinuously during the 'reciprocation of said type bed and means toinsulatesaid magnets from heat.

' 3. In a reciprocating type bed for printing of paper, a plurality ofheating elements to heat the bed, a plurality of electric magnetsmounted below said type bed, said magnets being spaced from each other,means to supply electric current to said magnets, means. tojsupply saidcurrent to any predetermined number of said magnets, and means tomaintain said current supply continuously during-the reciprocation ofsaid type bed.

5. In a type bed .for printing presses for printing spots of waxcarbonon sheets of paper','a plurality of heating elements to heat thebed, a

. plurality of electric magnets mounted therein,

said magnets being spaced from each other, the cores 'of said magnetsextending through said type bed and terminating at its surface, flexibleelectric conductors to convey electric current to said magnets, andmeans to Supply said current to any predetermined number of said magnets6. In a reciprocating type bed for printing spots of wax carbon vonsheets of paper, a pluralityof heating elements to heat the bed, a

plurality of electric magnets, the cores of which extend through saidtype bed to its surface, the

windings of said magnets being below said typebed, said cores beingspaced from each other, and means to protect said magnets lfrom the-heat of the bed.

7. In a reciprocating type bed for printing spots of wax carbon onsheets of paper, a plurality of electric heating elements located insaid type bed to heat-it, a pluralityrof electric magnets, theY cores ofwhich extend through said type bed to its surface, the windings of saidmagnets being below said type bed, said cores being spaced from eachother, and means -to protect the cores of said magnets from the heat ofthe type bed. y

-8. In a reciprocating typevbed for printing spots of wax carbon onsheetsof paper, a plurality of heating elements to heat the bed, apluralityj of electric magnets, the cores of which i extend through saidtype bed to its surface, the

windings of said magnets being below said type 1 bed, and said coresbeing spaced from each Other.- o

l WILLrAM rn BURKE.

